List of top Questions asked in CBSE CLASS XII- 2025

Amplification of gene of interest by using DNA polymerase may go up to:

Identify the labelled parts P, Q, R, and S in the stages of a dicot embryo shown in the diagram.

Choose the option that indicates correct labelling of 'P', 'Q', 'R', and 'S' of embryo in differenct stages of its development.

Match the following items of Column-I with that of Column-II:

Column-I	Column-II
(a) Trophoblast	(iv) Outer layer of blastocyst
(b) Implantation	(i) Embedding of blastocyst in the endometrium
(c) Inner cell mass	(ii) Group of cells that would differentiate as embryo
(d) Morula	(iii) Embryo with 8–16 blastomeres

Choose the option that matches Column-I with Column-II correctly:

Transplantation of tissues/organs to some patients often fails due to rejection by the body of the patient. Which type of immune response is responsible for such rejections?

The process of mineralization by microorganisms helps in the release of:

Match the items in Column-A with that of Column-B:

Choose the option that matches the items of Column A with that of B correctly:

GEAC stands for

A man whose father was colour-blind marries a woman who had a colour-blind mother and normal father. What percentage of male children of this couple will be colour-blind?

An object has moved through a distance can it have zero displacement if yes support your answer with an example.

Evaluate the integral: \[ \int_{0}^{\frac{\pi}{4}} \sqrt{1 + \sin^2 x} \, dx \]

Let \( \vec{p} \) and \( \vec{q} \) be two unit vectors and \( \alpha \) be the angle between them. Then \( (\vec{p} + \vec{q}) \) will be a unit vector for what value of \( \alpha \)?

A cylindrical tank of radius 10 cm is being filled with sugar at the rate of 100π cm3/s. The rate at which the height of the sugar inside the tank is increasing is:

If \( y = \sin^{-1}x \), where \( -1 \leq x \leq 0 \), then the range of \( y \) is:

Suggest any three measures to maintain peace in Jammu and Kashmir.

Analyse any three reasons for the disturbance and unrest in Kashmir.

Highlight any four Directive Principles of State Policy that have been included in the Constitution of India for International peace and security.

Agenda-21 contains a list of _________.

Which one among the following agreements was to cut the greenhouse gas emissions?

Choose the correct option to fill in the blanks:
Indira Gandhi and Z.A. Bhutto signed _______ agreement in the year

Choose the correct statement about India's nuclear policy from the statements given below:

Which leader played an important role in the disintegration and coup against Soviet Union?

Given below are two statements:
Statement-I: There were sections of Soviet society which felt that Gorbachev should have moved much faster and were disappointed and impatient with his methods.
Statement-II: Communist Party and those who were served by the system felt that their power and privileges were eroding and Gorbachev was moving too quickly.

Analyse the Assam movement as a combination of cultural pride and economic backwardness.

Analyse the secessionist movement of the people of Mizo Hills area from 1966-1986.

Analyse any four factors that enhanced the popularity of Indira Gandhi in the early 1970s.